Filtration device



FIG. 1 is a top perspective view of a filtration device;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a cross-sectional view thereof taken along line 6-6 in FIG. 4;and,

FIG. 7 is a bottom perspective view thereof.

CLAIM The ornamental design for a filtration device, as shown anddescribed.